Adjusting device.



H. J. MITCHELL.

ADJUSTING DEVICE.

APPLICATION FILED JUNE 26, 1911.

Patented Oct. 13, 1914.

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, UNITED STATES PATENT OFFICE.

HARRISON J. MITCHELL, OF BELOIT, WISCONSIN, ASSIGNOB TO THE BERLIN-MACHINE WORKS, OF BELOI'I, WISCONSIN, .A. CORPORATION OF WISCONSIN.

ADJUSTING DEVICE.

Application filed. June 26, 1911. Serial No. 635,251.

To all whom it may concern Be it known that I, HARRISON J. MITCH- ELL, a citizen of the UnitedStates, residing at Beloit, in the county of Rock and State of YVisconsi'n, have invented certain new and useful Improvements in Adjusting Devices, of which the following is a specification.

After a board comes in contact with the cutter head in a planer, it is necessary that to prevent the board from curling upwardly it should be engaged by a flattening mechanism to retain the board in its proper straight condition. It is necessary that this flattening mechanism should always engage the surface of the board with perfect evenness and with the desired amount of pressure, and it is the object of my invention to provide adjusting means by which this result can be accomplished. I attain this result by providing a vertically movable engaging member v which is adjusted by means of wedge blocks moved by a suitably threaded adjusting rod. These wedge blocks are preferably moved in opposite directions so that the two ends of theboardengaging member are forced downwardly to an equal extent on rotation of the adjusting rod- If, however, one end of the engaging member is higher than the other, the adjusting rod as a whole may be moved by rotation of an adjusting sleeve, and in this way the ends of the engaging member are brought into the proper alinement. lhese and other advantages of my invention will be more readily understood by reference to the accompanying drawings, in which,

Figure 1 is a vertical longitudinal section through the flattening mechanism; Fig. 2 is a transverse section taken on the line 22 of Fig. 1; Fig. 3 is an enlarged fragmentary longitudinal section showing a portion of the adjusting rod and the adjusting sleeve connected therewith; and Fig. 4 is a transverse section on the line 4-4 of Fig. 1.

The flattening mechanism comprises a frame 10, integral with which are the inverted U-shaped end. members 11 and 12, the end member 11 having the walls 13 and 14, whilethe end member 12 has the .walls 15 and 16. Integral with the frame 10 are the extensions 17 having the vertical threaded apertures 18. Each of these apertures receives a threaded screw 19, which engages Specification of Letters Patent.

Patented Oct. 13,1914.

one end of the coiled spring 20. :Each screw 19 issecurely held vin its adjusted position by a suitable set screw 21.

The board-engaging member 22 is vertically movable between the extensions 17 of the frame 10, and is provided with integral projections 23 which contain suitable recesses for engagementxwith the springs 20. Theactio-n of the springs 20 is, therefore, to normally force the engaging member22 upwardly. 7 1

Passing, longitudinally through the frame 10 is the adjusting rod .24 having oppo-, sitely threaded portions 25 and 26. adjusting rod 24 passes through suitable apertures in the wedge blocks 27 and 28,these apertures being threaded for the'accommodation ,ofwthe portions 25 and 26, re-

The i spectively, of the adjusting rod. The upper lowed. to move upwardly. by the action of the springs 20, which serve to always keep the projections 29 in contact with the lower surfaces of the wedge blocks 27 and 28.

The sleeve 30 has suitable threaded engagement withanape'rture in the wall 13'. This. Sleeve. has the head 31, which may be engaged by a suitable tool in a well known manner for the purpose of rotating the sleeve.

On the adjusting rod 24is theicollar 32, which engages one end of the sleeve 30, while the head 31. of said sleeve is engaged 'bythe nut 33 held inits adjusted position by means ofthe locking nut-34. The sleeve 30 is prevented from rotatingby the set screw 36. On the end of the adjusting rod 24 is mounted the handle 35 by means of which the adjustingrod may berotated.

Having thus described the various parts used in my invention, its operation may now be readily understood: When it is desired to dep'ressthe engaging member 22 the adjusting "rod 24 is rotated by means of the handle 35 in a contra-clockwisedirec tion,; thereby causing the wedge block; 27

to move to the left and the wedge block 28 to move to the right. The engaging member 22 is thereby forced downwardly against the tension of the springs 20, which serve to keep the projections 29 in contact with the wedge blocks 27 and 28 at all times. It will be apparent that the adjusting rod 24 is ield from longitudinal movement by means of the cooperative action of the collar 32 and the nut 33, which engage opposite ends of the sleeve 30. If one end of the engaging member 22 is lower than the other and it is desired to correct this faulty alinement, the set screw 36 is loosened, and the sleeve 30 is then rotated, thereby causing the adjusting rod 24 to be bodily moved in a longitudinal direction and changing the relative engagement of the wedge blocks 27 and 28 with the projections 29 until the two ends of the engaging member 22 are in the correct alinement. The set screw 36 is then brought into engagement with the sleeve 30, which is thus secured against further rotation.

It will be apparent to those skilled in the art that many changes could be made in the detailed construction of the parts which are described without departing from the spirit or scope of my invention.

What I claim is:

1. In an adjusting device, the combination of a frame, a member movable within said frame, oppositely acting means adjacent to its ends for moving said member, means for actuating said moving means in opposite directions to act upon both ends of the member, and means to shift the moving means in a common direction to act upon one end of the member for changing the angle of inclination between said member and said frame, substantially as described.

2. In an adjusting device for planers and the like, the combination of a frame, a movable engagingmember within said frame, a pair of wedge blocks in contact with said engaging member near its ends, an adjusting rod for simultaneously actuating said wedge blocks and thereby moving said engaging member, and means for longitudinally moving said adjusting rod, whereby the positions of said wedge blocks are altered and the angle of inclination between said engaging member and said frame is changed, substantially as described.

3. In an adjusting device for planers and the like, the combination of a frame, a movable engaging member within said frame, a pair of wedge blocks in contact with said engaging member near its ends, an adjusting rod for simultaneously actuating said wedge blocks, and a sleeve engaging said adjusting rod, longitudinal movement of said sleeve correspondingly moving said adjusting rod and altering the positions of said wedge block's, whereby the angle of inclination between said engaging member and said frame is changed, substantially as described.

a. In an adjusting device for planers and the like, the combination of a frame, a movable engaging member within said frame, a pair of wedge blocks in contact with said engaging member near its ends, an adjusting rod for simultaneously actuating said wedge blocks, a sleeve engaging said adjusting rod, longitudinal movement of said sleeve correspondingly moving said adjusting rod and altering the positions of said wedge blocks, whereby the angle of inclination between said engaging member and said frame is changed, and means for preventing movement of said sleeve, substantially as described.

5. In an adjusting device for planers and the like, the combination of a frame, a movable engaging member within said frame, a pair of wedge blocks in contact with said engaging member near its ends, an adjust ing rod having threaded engagement with said wedge blocks, whereby on rotation of said adjusting rod the wedge blocks and the engaging member will be moved, and a sleeve loosely mounted on said adjusting rod and having threaded engagement with said frame, whereby on rotation of said sleeve said adjusting rod will be moved longitudinally, thereby changing the positions of said wedge blocks and the angle of inclination between said engaging member and said frame, substantially as described;

6. In an adjusting device for planers and the like, the combination of a frame, a movable engaging member within said frame, a pair of wedge blocks in contact with said engaging member near its ends, an adjusting rod having threaded engagement with said wedge blocks, whereby on rotation of said adjusting rod the wedge blocks and the engaging member will be moved, a sleeve loosely mounted on said adjusting rod and having threaded engagement with said frame, and abutment members on said adjusting rod, whereby on rotation of said sleeve said adjusting rod will be moved longitudinally, thereby changing the positions of said wedge blocks and the angle of inclination between said engaging member and said frame, substantially as described.

7. In an adjusting device, the combination with a frame, of a member movable within said frame, means adjacent to its ends for moving said member, means for actuating said moving means to act uniformly on both ends of the member, means for holding said member in contact with said moving means, and means to bring said moving means into action upon one end only of the member for changing the angle of inclination between said movable member and said frame, substantially as described.

8. In an adjusting device for planers and the like, the combination of a frame, a movable engaging member Within said frame, a pair 0]": Wedge blocks in contact With said engaging member near its ends, resilient means for holding said engaging member in contact with said Wedge blocks, and means for actuating said Wedge blocks, whereby said engaging member Will be moved, substantially as described.

9. In an adjusting device for planers and the like, the combination of a frame, a movable engaging member Within said frame, a pair of Wedge blocks in contact with said. engaging member near its ends, resilient means for holding said engaging member in contact With said Wedge blocks, an adjusting rod for simultaneously actuating said Wedge blocks and thereby moving said engaging member, and means for longitudinally moving said adjusting rod, ,Whereby the positions of said Wedge blocks are alteredand the angle of inclination between the said engaging member and said frame is'changed, substantially as described.

HARRISON J. MITCHELL.

Witnesses:

T. A. HoRsTMAN, L. M. RANDALL.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Iatents,

Washington, D. C. 

